Course: Science Subtest II
Lesson: Ecology
Topic: Introduction to Ecology      Page 10 of 18  


Biomes are major geographic regions that are characterized by their dominant forms of plant life and the prevailing climate. For example, deserts are characterized by low rainfall - less than 50 cm/year and. The number of biomes on earth can vary from five to over twenty, depending on whom you ask.

Terrestrial (land) biomes:

Map of Terrestrialbiomes classified by vegetation. Image: By Sten Porse. License: Creative Commons Attribution ShareAlike 3.0.